Top curtain slides up & down in front of bottom curtain -
“Cold Weather Ventilation Position”

Both curtains roll up for storage Top curtain not yet in
storage position -
“Heat Wave Position”

• Top curtain slides up & down for cold weather
  ventilation. Cold air enters the building over the
  top of this curtain, then mixes with the warmer
  air inside before being exhausted.
• Both curtains roll-up for storage
• No shelves to accumulate debris
• Curtain fabric is either flat or rolled. Stays cleaner,
  lasts longer
• Unlike other split curtains the SLIDER SYSTEM
  has no center plank or shelf. This wide open
  design provides:
  • minimum air restriction
  • maximum air flow

• Reinforced heavy duty translucent vinyl
  with a high UV inhibitor formula
• Heavy Duty translucent polyethelene

• Keder tube is a 2” aluminum extrusion which
  replaces the traditional hempipe.
• Instead of 4” hems on the fabric, a nylon rope is
  welded at the top and bottom edge of the curtain.
• Rather than pushing 200’ of hempipe through a
  4” hem simply hang the top keder tube, then
  slide the curtain into the opening. Once the
  curtain is hanging, slide the bottom keder tube
  over the rope hem at the bottom of the curtain.
  • less weight
  • easier installation

• Two heavy duty, 80:1 right angle gearboxes roll up the top & bottom curtains. A shepherd’s crook attaches to the input shaft. A 3/8˝ electric drill (furnished by the owner) provides the power. An optional motorized gearbox (shown in photo below) makes this operation even easier.

• Nylon rollers prevent the gearbox assembly from binding as it easily moves up or down the galvanized guidetube. You can roll up a 200' curtain in less than 5 minutes.

• Galvanized Endwall Covers are included with the system. These covers protect the guidetube & gearbox assemblies from the elements as well as preventing wind damage to end of curtain (covers available in stainless steel)
  • A standard system includes one dead end cover permanently fastened to the building and one drive end cover hinged to provide easy access to the gearbox assemblies.

• Very long systems will have two dead end covers with the drive cover located in the center.
   
• 2" wide nylon strapping with tensioners installed 5´ on center are far superior to zig zag cord for protecting the curtain in high wind conditions.
   
• Top curtain can be controlled with a manual winch or automatic controller and thermostat. All top curtain hardware has been used on conventional Norbco Flexwall Curtains for over 15 years.

• Can be installed on greenhouse, fabric covered, timber column or pre-engineered steel buildings. Many farmers have chosen to add the roll-up storage feature to their single, lift up curtains.